Replaced almost every instance of ARSF with PML in project information and line information xml.

Changed the project_information xml file so ARSF ops are not mentioned and ARSF DAN are only mentioned were appropriate. The original file is in the project_information directory as HS2-AF14H788-2014_236-project_original.xml for the purpose of quality checking. This will need to be removed if everything looks ok with the new xml file.

As above with line_information files. Original files are kept in line_information/original for the purpose of delivery checking. These will need to be removed before data is sent.